Will it smell when I unpack it?

Very little. This soft memory foam mattress is built entirely on CertiPUR-US certified foams, independently tested for low emissions, and it ships flat in a bag rather than tightly vacuum-compressed, so there is no concentrated odor waiting to escape. Any faint new-foam scent clears in under 12 hours. Unpack it in a room with a little airflow, give it a day, and even sensitive sleepers should find the break-in smell barely noticeable.